How do I compile to a shared library? without libc++_shared.so ?

[azkadev]

I want to experiment with using whisper into the app, but when I open it, an error occurs when the compiled library requires libc++_shared.so,

i use this bash to build for android target

/home/azkdev/Android/Sdk/ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android21-clang -pthread -O3 -std=c11 -mavx -mavx2 -mfma -mf16c -c ./ggml.c -fPIC -lstdc++
/home/azkadev/Android/Sdk/ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android21-clang++ -pthread -O3 -std=c++11 -mavx -mavx2 -mfma -mf16c -c ./whisper.cpp -fPIC -lstdc++
/home/azkadev/Android/Sdk/ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android21-clang++ -pthread -O3 -std=c++11 ./main.cpp -fPIC -lstdc++ whisper.o ggml.o -o ./whisper.so --shared -fPIC -lstdc++

I have also tried this clang-linking-so-library-libc-shared-so, but it doesn't work

Error

can you give a build command so it doesn't need libc++_shared.so? sorry i'm still a beginner in cpp

[ggerganov]

Does this work:

gcc -O3 -std=c11 -pthread -mavx -mavx2 -mfma -mf16c -fPIC -c ggml.c
g++ -O3 -std=c++11 -pthread --shared -static-libstdc++ whisper.cpp ggml.o -o libwhisper.so

Then you can link libwhisper.so like this, for example:

g++ main.cpp -L. -lwhisper

Also, I'm pretty sure you don't need the -mavx -mavx2 -mfma -mf16c flags for Android, so you can remove them. You might need some other flags though, not sure. Might want to check this comment:

#18 (comment)

[azkadev]

Thank you very much, now I can convert audio to text, thanks for porting to cpp, and thanks for helping me,

[Topping1]

@azkadev can you please give some tips on how to create a minimal application with whisper like the one you are showing? I have not much experience in C++ or android application coding.
@ggerganov I did an experiment myself compiling the code on android, using the CxxDroid compiler and it worked perfectly. On a Snapdragon 712 with 6gb Ram I get 6.5s for transcribing jfk.wav (11s) with tiny model, 16s with base model and 62s with small model. Pretty decent for a midrange chipset.

[azkadev]

@azkadev can you please give some tips on how to create a minimal application with whisper like the one you are showing? I have not much experience in C++ or android application coding. @ggerganov I did an experiment myself compiling the code on android, using the CxxDroid compiler and it worked perfectly. On a Snapdragon 712 with 6gb Ram I get 6.5s for transcribing jfk.wav (11s) with tiny model, 16s with base model and 62s with small model. Pretty decent for a midrange chipset.

I don't know tips, you can see my repo here, sorry my english is bad